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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >The within-tree variation in wood density and shrinkage, and their relationship in Populus euramericana
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The within-tree variation in wood density and shrinkage, and their relationship in Populus euramericana

机译：美洲杨木内树木密度和收缩率的变化及其关系

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摘要

The patterns of wood density and shrinkage in different directions in 22-year-old Populus euramericana trees from one clone were studied in an experimental plantation in Iran. Sample disks were taken from each tree to examine wood density and shrinkage variation from pith to bark at 5%, 25%, 50%, and 75% of total tree height. The results indicate that radial position and height significantly affected all wood physical properties. Within-tree wood density and shrinkage varied at each height level, decreasing along the stem from the base upwards. Moreover, within the samples, at the same height level wood density and shrinkage in the radial direction increased from the pith outwards. Regression analysis showed that longitudinal, radial, tangential, and volumetric shrinkage each had a significantly positive correlation with wood density. Key words: Populus euramericana, wood density, wood shrinkage, variation, correlation
机译：在伊朗的一个实验性人工林中研究了来自一个克隆的22岁杨树美洲杨树中不同方向的木材密度和收缩方式。从每棵树上取样品盘，以检查木材密度和收缩率（从髓到树皮）在总树高的5％，25％，50％和75％处。结果表明，径向位置和高度显着影响了所有木材的物理性能。树木内部的木材密度和收缩率在每个高度水平上都不同，从根部开始沿茎向上逐渐降低。此外，在样品内，在相同的高度水平下，木材的密度和径向收缩率从髓核向外增加。回归分析表明，纵向，径向，切向和体积收缩率均与木材密度显着正相关。关键词：美洲杨木材密度木材收缩变异相关性

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